I totally forgot to post for you!
I think this is a great map and it's one of the best put together alphas I have played in a while. Really refreshing. Here are some things I think you should think about (and in some cases you are already).
http://i.imgur.com/a7IzR.jpg
I like that 2/4 is kind of out of the way, like Badlands, and I think it works fine and won't be an issue. But I think that you should do something to this to make it stand out more, because at this point it just looks like high ground. The spire is kind of an attention grabber, since it's alone and huge and weird; your 2/4 isn't so unique.
http://i.imgur.com/rMbz9.jpg
Coming from last and moving this this doorway, my instinct is not to go right. I've already turned right once and it feels weird to do it again. I'm moving back towards spawn now if that's what I do. The arrow is there, but it doesn't stand out at all (blue on blue, and it's in shadow), nor is it invasive enough for me to want to follow it when I do see it. It took me a while to get this down.
http://i.imgur.com/VjsHc.jpg
This got me a few times also. Coming out of this spawn, my instinct is to go through the huge open door right next to me with glowing signs in it that say EXIT and CAPTURE POINT. You know? Not that gray tunnel.
http://i.imgur.com/E3Nhm.jpg
This is a long boring walk that I don't like much.
http://i.imgur.com/sMHBY.jpg
Another 180 degree turn, but this one is a lot tighter than the one I just posted about. Again, the sign just doesn't stand out. In this case, I might suggest doing the moving sign trick and placing a large billboard sign in front of the player, in the door that looks at mid (not in this screen), then another pointing right, into the tunnel. Up to you.
http://i.imgur.com/SEH8N.jpg
This is backwards. The roller goes inside.
http://i.imgur.com/VLgTL.jpg
http://i.imgur.com/n3IOc.jpg
May want to fix this! There are a few other minor visual things that I didn't screenshot because it's an a1, like the displacement near the hydro guard rail being just a top. I'm sure you know about it.